Best-selling Christian author Max Lucado spoke at a memorial service on Tuesday honoring the men who died in the April 20 explosion of the Deep Water Horizon oil rig in the Gulf of Mexico.

"There is much about April 20 that we do not know, but of this we can be sure: Jesus was there," Lucado said to the victims' families at the Jackson Convention Complex.

"When others only saw flash and fire and heard explosions and noise, there were 11 members of God's flock who saw the face of Jesus," he continued. "At that moment, they followed him through the thin veil of eternity into heaven."

Transocean Ltd., the Swiss-based owner of the Deepwater Horizon rig, organized the service.

"This is the one of the most difficult days for many of us here. But for the families of our 11 lost colleagues, this is just another of many difficult days," Transocean CEO Steven Newman said.

Meanwhile, British Petroleum has another plan to contain the oil currently gushing into the Gulf, and the world will be able to watch through an underwater camera.

The so-called "Top Kill" plan will pump thick mud into the leak. But such a maneuver has never been attempted at a depth of 5,000 feet before. If the maneuver doesn't succeed, experts predict it could make matters worse.

"By imposing the high pressure, we might actually cause the flow rate to increase instead of decreasing," University of Texas Prof. Ted Patzek explained.

On Thursday, Interior Secretary Ken Salazar will present the president with a report on possible causes of the accident. President Obama is scheduled to travel to the region Friday to assess the spill.